The problem is that the expedition would be a money-loser for the US, but a money-maker for the Chinese. They can just wait until we run out of money for such adventures in do-good-ism
Africa is a wonderful place -- it has unique wildlife and abundant natural resources. The whites who settled in South Africa and Rhodesia could have exterminated the blacks like the American settlers came close to doing with the Native Americans. They didn't because the blacks were a cheap source of labor. The Chinese, should they come in, will not need the blacks as a cheap source of labor -- they have their own people.
The Chinese settlement of Africa will be more along the lines of the British settlement of the US